What is the quality and material of Kingston Brass' bathroom faucet?

Nearly all Kingston’s bathroom faucets are solid brass construction. The main faucet bodies, waterways, and handles are all brass. Other materials in these faucets such as porcelain or acrylic are accent materials on handles, aerators, and the like. For the remainder of our bathroom faucets, primary materials include zinc alloy, a highly resistant metal, and Engineering Grade ABS, a highly durable non-leaching plastic. Kingston also offers faucets with ABS waterways to suit certain specialized applications.

Bathroom Faucets: from classic to modern, design your perfect bathroom!
https://www.kingstonbrass.com/cat/bathroom-faucets/